/// <summary>
/// Executes the robor action.
/// </summary>
/// <remarks>
/// Lost robots will not move.
/// Move to known lost places will be ignored.
/// If a robors is lost a landmark will be added.
/// </remarks>
public void Execute(Robot robot, IPlanetMap map)
{
// Troubled robots can't move
if (robot.IsLost())
{
return;
}
var nextCoords = map.GetNextCoordinates(robot.Coordinates, robot.Orientation);
// If any lost landmark in current position
// Get next position to check if next coord it's marked as lost
// Already recorded as lost landmarks will be avoided
var lostLandmarks = map.GetLostLandmarks();
var nextIsLost = lostLandmarks.TryGetValue(robot.Coordinates, out var marks) &&
marks.Any(m => m.LostRecordedCoords == nextCoords);
if (nextIsLost)
{
return;
}
if (map.IsOutOfBounds(nextCoords))
{
// If next position is out of bounds, robot will be lost
// and a lost landmark should be marked at last seen coordinates
robot.Troubles.Add(new LostRobotTrouble());
map.AddLandmark(robot.Coordinates, new LostLandmark(nextCoords));
}
else
{
robot.Coordinates = nextCoords;
}
}
/// <summary>
/// Executes the robor action
/// </summary>
public void Execute(Robot robot, IPlanetMap map)
{
// Troubled robots can't move
if (robot.IsLost())
{
return;
}
// Get current orientation
// Change orientation
robot.Orientation = map.TurnLeft(robot.Orientation);
}
/// <summary>
/// Returns lost landmarks from a mao.
/// </summary>
public static IDictionary <Coordinates, IEnumerable <LostLandmark> > GetLostLandmarks(this IPlanetMap map)
{
return(map.GetLandmarks()
.Where(p => p.Value.OfType <LostLandmark>().Any())
.ToDictionary(p => p.Key, p => p.Value.OfType <LostLandmark>()));
}
/// <summary>
/// Creates an instance.
/// </summary>
public void MapPlanet(IPlanetMap map)
{
Map = map;
}